2015 MERCEDES-BENZ B-CLASS HATCHBACK tailgate

Switching off the alarm .................... 68
ATTENTION ASSIST
Activating/deactivating ................. 183
Display message ............................ 205
Function/note s............................. 165
Audio menu (on-board computer) .... 180
Authorised workshop
see Qualified specialist workshop
AUTO lights
Display message ............................ 203
see Lights
Automatic front-passenger front
airbag deactivation
Display message ............................ 199
Automatic front-passenger front
airbag deactivation system
Operation ......................................... 42
Problems ......................................... 46
System self-test ............................... 45
Automatic headlamp mode ................ 98
Automatic transmission
Display message ............................ 210 B
Bag hook ............................................ 229
BAS (Brake Assist System) ................. 62
Battery (key)
Checking .......................................... 74
Important safety notes .................... 74
Replacing ......................................... 75
Battery (vehicle)
Charging ........................................ 256
Display message ............................ 204
Important safety notes .................. 254
Jump starting ................................. 258
Belt
see Seat belts
Belt tensioner
Activation ......................................... 46
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 183
Display message ............................ 206
Notes/function .............................. 169
Bonnet
Closing ........................................... 240
Display message ............................ 211 Important safety notes .................. 239
Opening ......................................... 239
Boot lid
see Tailgate
Boot load (maximum) ........................ 284
Brake
EBD .................................................. 66
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 195
Notes ............................................. 283
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Adaptive ........................................... 65
Display message ............................ 201
Brake system
Driving safety systems ..................... 67
Brakes
ABS .................................................. 61
Adaptive Brake Assist ...................... 64
BAS .................................................. 62
Brake fluid (notes) ......................... 283
Display message ............................ 190
Driving tips .................................... 148
Hill start assist ............................... 128
HOLD function ............................... 154
Important safety notes .................. 148
Parking brake ................................ 146
Warning lamp ................................. 215
Breakdown
Towing away .................................. 260
Where will I find...? ........................ 248
see Flat tyre
Brightness control (instrument
cluster lighting) ................................... 27
Buttons on the steering column ...... 174 C
Calling up a fault see Display messages
Car
see Vehicle
Car wash (care) ................................. 2434
Index

Snow chains
...................................... 269
Socket
Luggage compartment ...................2 36
Sockets
Centre console .............................. 235
General notes ................................ 235
Rear compartment ......................... 236
Specialist workshop ............................ 23
Spectacles compartment ................. 225
Speed, controlling
see Cruise control
Speedometer
Activating/deactivating the addi-
tional speedometer ........................ 186
Digital ............................................ 178
In the Instrument cluster ................. 27
Selecting a display unit .................. 186
SPEEDTRONIC
Deactivating variable ..................... 154
Function/notes ............................ .152
Important safety notes .................. 152
LIM indicator lamp ......................... 153
Selecting ........................................ 153
Storing the current spee d.............. 153
Variabl e......................................... 153
SPEEDTRONIC (variable)
Storing the current speed and
calling up the last stored speed ..... 153
Start/Stop button
Removing ....................................... 127
Starting the drive system ............... 127
Starting
the Vehicle ..................................... 127
Starting the vehicle. .......................... 127
STEER CONTROL .................................. 67
Steering
Display message ............................ 212
Steering assistant STEER CON-
TROL
see STEER CONTROL
Steering wheel
Adjusting (manually) ........................ 92
Button overview ............................... 29
Buttons (on-board computer) ......... 174
Cleaning ......................................... 247
Gearshift paddle s........................... 132
Important safety notes .................... 92 Steering wheel gearshift paddles
.... 132
Stowage compartment
Map pockets .................................. 227
Stowage compartments
Armrest (front) ............................... 225
Armrest (under) ............................. 226
Centre console .............................. 225
Centre console (rear) ..................... 226
Cup holde r..................................... 233
Glove compartment ....................... 225
Important safety information ......... 224
Spectacles compartment ............... 225
Under driver's seat/front-
passenger sea t.............................. 226
Stowage net ....................................... 227
Stowage space
Stowage net ................................... 227
Summer tyres .................................... 268
Sun visor ............................................ 234 T
Tail lamps see Lights
Tailgate
Display message ............................ 211
Emergency unlocking ....................... 81
Important safety notes .................... 81
Opening dimensions ...................... 284
Opening/closing (from outside) ....... 81
Technical data
Capacities ...................................... 282
Information .................................... 280
Tyres/wheels ................................. 277
Vehicle data ................................... 284
Telephone
Accepting a call (multifunction
steering wheel) .............................. 181
Display message ............................ 212
Introduction ................................... 181
Menu (on-board computer) ............ 181
Number from the phone book ........ 181
Redialling ....................................... 182
Rejecting/ending a call ................. 181
Telephone compartment ................ 226
Temperature
Outside temperature ...................... 172
Setting (climate control )................ 117 Index
15

ATA (Anti-Theft Alarm system)
X
To prime: lock the vehicle with the key or
KEYLESS-GO.
Indicator lamp :flashes. The alarm system
is primed after approximately 15 seconds.
X To deactivate: unlock the vehicle with the
key or KEYLESS-GO.
or X Insert the key into the ignition lock.
A visual and audible alarm is triggered if the
alarm system is primed and you open: R a door
R the vehicle with the emergency key element
R the tailgate
R the bonnet
X To switch the alarm off with the key: press
the % or& button on the key.
The alarm is deactivated.
or X Vehicles with KEYLESS-GO start-function
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock (Y page 126).
X Insert the key into the ignition lock.
The alarm is deactivated.
X To deactivate the alarm using KEYLESS-
GO:
grasp the outside door handle. The key
must be outside the vehicle.
The alarm is deactivated.
or X Press the Start/Stop button on the dash-
board. The key must be inside the vehicle.
The alarm is deactivated.
The alarm is not switched off, even if you close
the open door that has triggered it, for example.
i If the alarm stays on for more than
30 seconds, the Mercedes ‑Benz emergencycall system automatically sends a message to
the Customer Assistance Centre. This is done by means of a text message or a data con-
nection.
The emergency call system sends a message
or establishes a data connection provided
that:
R you have subscribed to the Mercedes ‑Benz
emergency call system
R the Mercedes‑Benz emergency call system
has been activated properly
R the necessary mobile phone network is
available Tow-away protection
Function An audible and visual alarm is triggered if your
vehicle's angle of inclination is altered while
tow-away protection is primed. This can occur if
the vehicle is jacked up on one side, for exam-
ple.
Activating X
Make sure that:
R the doors are closed
R the tailgate is closed
Only then is tow-away protection primed.
X Lock the vehicle with the key or KEYLESS-GO.
Tow-away protection is primed after approx-
imately 60 seconds.
Switching off X
Unlock the vehicle with the key or KEYLESS-
GO.
or X Insert the key into the ignition lock.
Tow-away protection is switched off automat-
ically. 68
Protection against theftSafety

Deactivating
X
Remove the key from the ignition lock.
or X Vehicles with KEYLESS-GO start function
or KEYLESS-GO: switch off the drive system
using the Start/Stop button and open the
driver's door.
X Press button :.
Indicator lamp ;lights up briefly.
X Lock the vehicle with the key or KEYLESS-GO.
Tow-away protection is deactivated.
Tow-away protection remains deactivated until: R the vehicle is unlocked again
R a door is opened and closed again and
R the vehicle is locked again
To prevent a false alarm, deactivate tow-away
protection if you lock your vehicle and it:
R is being transported
R is being loaded onto a ferry or car transporter,
for example
R is parked on a movable surface, e.g. in a split-
level garage Interior motion sensor
Function When the interior motion sensor is primed, a
visual and audible alarm is triggered if move-
ment is detected in the vehicle interior. This can occur if someone reaches into the vehicle inte-
rior, for example.
Activating X
Make sure that: R
the side windows are closed
R there are no objects, e.g. mascots, hanging
on the rear-view mirror or on the grab han- dles on the roof trim
This will prevent false alarms.
X Make sure that:
R the doors are closed
R the tailgate is closed
Only then is the interior motion sensor
primed.
X Lock the vehicle with the key or KEYLESS-GO.
The interior motion sensor is primed after
approximately 30 seconds.
Switching off X
Unlock the vehicle with the key or KEYLESS-
GO.
or X Insert the key into the ignition lock.
or X Press the Start/Stop button.
The key must be in the vehicle.
The interior motion sensor is automatically
switched off.
Deactivating X
Remove the key from the ignition lock.
or X Vehicles with KEYLESS-GO start function
or KEYLESS-GO: switch off the drive system
using the Start/Stop button and open the
driver's door.
X Press button :.
Indicator lamp ;flashes several times in
rapid succession.
X Lock the vehicle with the key or KEYLESS-GO.
The interior motion sensor is deactivated. Protection against theft
69Safety Z

Key functions
:
& Locks the vehicle
; % Unlocks the vehicle
X To unlock centrally: press the%button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
R the vehicle locks again
R protection against theft is reactivated
X To lock: press the &button.
The key centrally locks/unlocks:
R the doors
R the tailgate
R the charge socket flap
When unlocking, the turn signals flash once.
When locking, they flash three times.
When the locator lighting is activated in Audio
20/COMAND Online, it lights up when it is dark
after the vehicle is unlocked with the remote
control (see separate operating instructions).
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated or deactivated using the
on-board computer (Y page 187).KEYLESS-GO
General notes Bear in mind that the drive system can be star-
ted by any of the vehicle occupants if there is a
key in the vehicle.
Locking and unlocking You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you need to carry the
key with you. You can combine the KEYLESS-GO functions with the functions of a conventional
key. Unlock the vehicle by using KEYLESS-GO,
for instance, and lock it using the &button
on the key.
The driver's door and the door at which the han- dle is used must both be closed. The key must beoutside the vehicle. When locking or unlocking
with KEYLESS-GO, the distance between the keyand the corresponding door handle must not be
greater than 1 m.
A check which periodically establishes a radio
connection between the vehicle and the key
determines whether a valid key is in the vehicle. This occurs, for example:
R when starting the drive system
R whilst driving
R when the external door handles are touched
R during convenience closing X
To unlock the vehicle: touch the inner sur-
face of the door handle.
X To lock the vehicle: touch sensor surface :
or ;.
Make sure that you do not touch the inner
surface of the door handle.
X Convenience closing feature: touch
recessed sensor surface ;for an extended
period.
For further information on the convenience
closing feature (Y page 83).72
KeyOpening and closing

X
To unlock the tailgate: pull tailgate han-
dle :.
Deactivating and activating If you do not intend to use the vehicle for an
extended period of time, you can deactivate
KEYLESS-GO. The key will then use very little
power, thereby conserving battery power. For
the purposes of activation or deactivation, the
vehicle does not have to be nearby.
X To deactivate: press the&button on the
key twice in rapid succession.
The battery check lamp of the key flashes
twice briefly and lights up once, then KEY-
LESS-GO is deactivated (Y page 74).
X To activate: press any button on the key.
or X Insert the key into the ignition lock.
KEYLESS-GO and all of its associated features
are available again. KEYLESS-GO start function
General notes Bear in mind that the drive system can be star-
ted by any of the vehicle occupants if there is a
key in the vehicle. Changing the settings of the locking
system
You can change the settings of the locking sys-
tem. This means that only the driver's door and
the charge socket flap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel alone.
X To change the setting: press and hold down
the % and& buttons simultaneously
for about six seconds until the battery indica-
tor lamp (Y page 74) flashes twice.
If the setting of the locking system is changed
within the signal range of the vehicle, pressing
the & or% button:
R locks or
R unlocks the vehicle
The key now functions as follows:
X To unlock: press the%button once.
X To unlock centrally: press the%button
twice.
X To lock centrally: press the&button.
The KEYLESS-GO function is changed as fol-
lows:
X To unlock the driver's door: touch the inner
surface of the door handle on the driver's
door.
X To unlock centrally: touch the inner surface
of the door handle on the front-passenger
door or the rear door.
X To lock centrally: touch the outer sensor
surface on one of the door handles.
X To restore the factory settings: press and
hold down the %and& buttons simul-
taneously for approximately six seconds until
the battery check lamp flashes twice
(Y page 74). Emergency key element
General notes If the vehicle can no longer be unlocked with the
key or KEYLESS-GO, use the emergency key ele-
ment.
If you use the emergency key element to unlock
and open the driver's door or the tailgate, the
anti-theft alarm system will be triggered
(Y page 68). Key
73Opening and closing Z

from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (Y page 69). The doors can then
be opened from the inside after the vehicle has been locked from the outside. You can open the
rear doors from inside the vehicle if they are not
secured by the child-proof locks (Y page 60).
The anti-theft alarm system is triggered if the
door is opened from the inside. Switch off the
alarm (Y page 68). Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle from
the inside. This can be useful if you wish to lock the vehicle before pulling away, for example. X
To unlock: press button :.
X To lock: press button ;.
If all the doors and the tailgate are closed, the
vehicle locks.
This does not lock or unlock the charge socket
flap.
You cannot unlock the vehicle centrally from the
inside if the vehicle has been locked with the key or KEYLESS-GO.
For all countries except the United Kingdom:
You can open a door from inside the vehicle
even if it has been locked.
If the vehicle has previously been locked with
the key from the outside, opening a door from
the inside will trigger the anti-theft alarm sys-
tem. Switch off the alarm (Y page 68).
You can open the rear doors from inside the
vehicle if they are not secured by the child-proof locks (Y page 60). When a locked door is opened from inside the
vehicle, the previous unlocking process will be
observed if the vehicle has been:
R locked with the locking button for the central
locking or
R locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. Only the door which
has been opened from the inside is unlocked if
only the driver's door had been previously
unlocked.
Only for the United Kingdom: if the vehicle
has been locked with the key, the double lock
function is activated as standard. It is then not
possible to open the doors from inside the vehi-
cle. You can deactivate the double lock function by deactivating the interior motion sensor
(Y page 69). The doors can then be opened from
the inside after the vehicle has been locked from
the outside. You can open the rear doors from
inside the vehicle if they are not secured by the child-proof locks (Y page 60). The anti-theft
alarm system is triggered if the door is opened
from the inside. Switch off the alarm
(Y page 68).
When a locked door is opened from inside the
vehicle, the previous unlocking process will be
observed if the vehicle has been:
R locked with the locking button for the central
locking or
R locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. Only the door which
has been opened from the inside is unlocked if
only the driver's door had been previously
unlocked. Automatic locking feature Doors
79Opening and closing Z

X
To deactivate: press and hold button :for
approximately five seconds until a tone
sounds.
X To activate: press and hold button ;for
approximately five seconds until a tone
sounds.
If you press one of the two buttons and do not
hear a tone, the relevant setting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing.
You could therefore be locked out if:
R the vehicle is being pushed
R the vehicle is being towed
R the vehicle is being tested on a dynamometer
You can also activate and deactivate the auto-
matic locking function using the on-board com- puter (Y page 187). Unlocking the driver's door (emer-
gency key element)
If the vehicle can no longer be unlocked with the key or KEYLESS-GO, use the emergency key ele-
ment.
If you use the emergency key element to unlock
and open the driver's door, the anti-theft alarm
system will be triggered (Y page 68).
X Take the emergency key element out of the
key (Y page 73).
X Insert the emergency key element into the
lock of the driver's door as far as it will go. X
Turn the emergency key element anti-clock-
wise as far as it will go to position 1.On right-hand-drive vehicles, turn the emer-
gency key element clockwise.
The door is unlocked.
X Turn the emergency key element back and
remove it.
X Insert the emergency key element into the
key (Y page 74). Locking the vehicle (emergency key
element)
If the vehicle can no longer be locked with the
key or KEYLESS-GO, use the emergency key ele-
ment.
X Open the driver's door.
X Close the front-passenger door, the rear
doors and the tailgate.
X Press the locking button on the driver’s door
(Y page 79).
X Check whether the locking knobs on the
front-passenger door and the rear doors are
still visible. Press the locking knobs down by
hand if necessary.
X Close the driver's door.
X Take the emergency key element out of the
key (Y page 73).
X Insert the emergency key element into the
lock of the driver's door as far as it will go. X
Turn the emergency key element clockwise as
far as it will go to position 1.
On right-hand-drive vehicles, turn the emer-
gency key element anti-clockwise.
X Turn the emergency key element back and
remove it.
X Make sure that the doors and the tailgate are
locked.
X Insert the emergency key element into the
key (Y page 74). 80
DoorsOpening and closing